1) “The Simpsons,” 8 p.m., Fox. “Treehouse of Horror” again has three tales – all of them weird and some very funny. The first is timely, as political rage creates red and blue monsters (shown here). The second (a Scrooge take-off) is so-so, but has a funny closing bit. The third is clever (albeit very adult); at the Pants For the Amply Rumped store, Homer gets killer jeans.
2) “Ridley” season-finale, 8 p.m., PBS. This season has had four two-part mysteries, three of them excellent. Now it wraps up one of the best: The disappearance of a troubled young wife and mom has led to a death and a complicated batch of suspects.
3) “The Walking Dead: Daryl Dixon” finale, 9 p.m., AMC. As last week ended, we learned that: Ash’s plane can only take two other people; someone (Daryl or Carol or Laurent) must stay. This finale has two high-octane scenes – one early, one late – and lots of quietly moving ones. It has a strong ending that manages to propel us toward ext season.
4) “20/20,” 10:02 p.m., ABC. Liam Payne was a teen-ager when he became part of One Direction, sometimes its busiest songwriters. The group had four No. 1 albums, then (after six years) splir into solo projects. Payne sold 18 million singles, but he died at 31, after falling 40-plus feet from a hotel balcony. Here’s report on his life and death.
5) ALSO: CMT has the perfect film for this hectic week: “Election” (1999), at 6:30, centers on a high school campaign gone bad. At 8 p.m., ABC has the animated gem “Coco” (2017) … CW profiles the Bill Clinton presidency (one day after a look at the Ronald Reagan years) … and CBS has “Tracker,” with “Equalizer” settling into its regular spot at 9.
— Mike Hug